<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>07_盒子模型边框与内间距</title>
    <style>
        .z1{
            width: 200px;
            height: 200px;
            background-color: lightgreen;
            border: 5px solid green;
            border-bottom: 15px dotted purple;
            margin-bottom: 30px;
        }
        .z2{
            width: 200px;
            height: 200px;
            background-color: lightsalmon;
            border-radius:50px;
            margin-bottom: 30px;
        }
        .z3{
            width: 200px;
            height: 60px;
            background-color: lightblue;
            border-radius:30px;
            margin-bottom: 30px;
        }
        .z4{
            width: 200px;
            height: 200px;
            background-color: cyan;
            border: 10px solid blue;
            padding: 20px;
            margin: 50px;
            box-sizing: border-box;
        }
    </style>
</head>
<body>
    <div class="fu">
        <div class="z1"></div>
        <div class="z2"></div>
        <div class="z3"></div>
        <div class="z4">111</div>
    </div>
</body>
</html>